查询词典 conical helix

Delay distortion caused by log-periodic antenna can be avoided by changing its feed ing method; Reflection can be greatly reduced by resistively loading antennas as cylindrical monopole antenna,conical monopole and TEM horn antenna, resulting in better characteristics in radiating pulse signal.

改变对数周期天线的馈电方式可以避免滞后失真；根据 WU- KING偶极子理论，对圆柱单极子天线、单圆锥天线和 TEM喇叭天线等进行加载可以有效减小反射，改善了天线辐射短脉冲的性能，但同时也导致了辐射效率的降

A utensil with a conical ridged center that is used for squeezing juice from citrus fruit.

有从柑橘类水果榨果汁的圆形皱状心孔的器具。

A novel ridged conical TEM horn antenna has been developed.

因此为设计超宽带天线打下了理论基础。

Leaves glossy deep green adaxially, narrowly linear-lanceolate, straight or slightly falcate, 0.8-6.5(-7) cm × 1.5-5 mm, midvein green abaxially, 0.3-1.2 mm wide, flat with median longitudinal keel throughout, stomatal bands present on both surfaces, bands on adaxial surface 0.5-1.5 mm wide, of 7-28 rows of stomatal, white powdery or not, bands on abaxial surface 1.2-2.8 mm apart, 0.3-0.8(-1) mm from leaf margin, not or rarely white powdery, base decurrent, margin denticulate, sometimes indistinctly so, especially on old trees, with 18-55(-90) teeth per side, apex usually symmetric and spinescent, spine 0.3-2 mm. Pollen cone fascicles terminal, 1-3(-5) together, broadly obovoid, each of 8-20 cones, occasionally a few also around base of seed cone; peduncle 2-4 mm; cones narrowly oblong-conical.

正面的叶有光泽的深绿色，披针形狭线形，直的或稍镰刀形， 0.8-6.5(-7)厘米×1.5-5毫米，中脉绿色背面，全部的0.3-1.2毫米宽，平的具中间的纵向的脊，气孔带宿存在两面，在正面0.5-1.5毫米宽上条纹状，7-28排stomatal的，与否白色粉状，相隔1.2-2.8毫米的条纹状的在背面，从叶缘的0.3-0.8(-1)毫米，白色敷粉的或很少的不，基部下延，边缘具小齿，有时不清楚如此，特别是在古树上，具18-55(-90)齿每边，先端通常对称和具刺，刺0.3个-2毫米雄球花束簇终端，花序梗2-4毫米；圆锥形孢子叶球狭长圆形。

Thyrses narrowly conical, to 30 cm, less than 3.5 cm wide, densely glandular hairy; peduncle less than 1 cm. Pedicel ca. 5 mm. Calyx ca. 2.5 mm; lobes linear-oblong, margin submembranous. Corolla ca.

聚伞圆锥花序狭圆锥状，对30厘米，少于3.5厘米宽，浓密腺毛；约的花序梗不到1 厘米花梗约5毫米花萼2.5毫米；裂片线形长圆形，边缘。

It will be more clinically significant that VSD is classified into perimembranous, conoventricular, atrioventricular canal or inlet, muscular and subpulmonary artery or conical types.

将室间隔缺损分为膜周型、圆锥隔心室型、房室通道型、肺动脉瓣下或圆锥隔型和肌部型更具有临床意义。

For many of the fittings, a hole or ring must first be cut in a flat metal sheet prior to the fixation of a tubular or conical piping member thereover.

对于很多的设备，一个大洞或环形必须首先被削减在一个单位金属板前以固定的管状或圆锥管涌会员thereover 。

In 1900, while he was engaged in clearing forests in Crimea, Russian engineer Friedrich Zibold discovered 13 large conical tumuli of stones, each about 10,000 feet square and 30-40 feet tall, on hilltops , near the site of the ancient Byzantine city of Feodosiya.

在1900年，而他所从事的在结算森林在克里米亚，俄罗斯工程师弗里德里希zibold发现13个大型圆锥tumuli的石块，每个约一万英尺广场和30-40英尺高，对山头，工地附近的古代拜占庭市

They may be acuminate, rounded, conical, flat-topped, or umbilicated, and may appear white, red, yellowish, reddish brown, or black.

可以为尖形、圆形、圆锥状、平顶，或呈脐凹状。颜色可为白色、红色、淡黄色、淡红褐色或黑色。

Stigma head umbonate or thick conical.

柱头头状花序有鳞脐的或厚圆锥状。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。